No one alive on this earth has first-hand experience with Dinosaurs whatever may be the creed, categories or type. Still, archaeologists and scientists firmly believe that they existed on the basis of their own theories and fossil findings.These diversified groups of reptiles are said to have appeared between 243 and 233.23 million years ago.

1. Dinosaurs and Their Existence -
Welcome to the Era of the
Unknowns
No one alive on this earth has first-hand
experience with Dinosaurs whatever may be
the creed, categories or type.
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2. Still, archaeologists and scientists
firmly believe that they existed on the
basis of their own theories and fossil
findings. Dinosaurs were discovered
back in 1842 and are broadly
categorised as avian and non-avian
dinosaurs.
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3. The Mystery - How Do We Know
That Dinosaurs Even Existed?
These diversified groups of reptiles are
said to have appeared between 243 and
233.23 million years ago.
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4. Evidence of dinosaurs' existence was
initially found in England in the late 17th
century. More in-depth knowledge about
dinosaurs has been derived from a variety
of fossil and non-fossil records. The
recorded shreds of evidence include
fossilized bones, faeces, gastroliths,
feathers, skin impressions, trackways,
organs, soft tissues and so on…
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5. Their Origins and Evolution
Long before fossils were discovered,
scientists believed that dinosaurs were the
ancestors of birds. Palaeontologists
consider Archaeopteryx to be the first
fossil discovery that revealed a possible
link between dinosaurs and modern birds.
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6. Dinosaurs originated during the
Triassic era then spread and evolved
during the Jurassic and Cretaceous
periods. There are over 900 distinct
genera and over 1,100 distinct species
of non-avian dinosaurs.
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7. Some of the most popular ones are
listed below-
Carnivores: Tyrannosaurus Rex,
Velociraptor, Spinosaurus
Herbivores: Apatosaurus, Diplodocus,
Triceratops
Omnivores: Deinocheirus,
Coloradisaurus, Dromiceiomimus
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8. You can acquire a vague idea of their
above-mentioned species' anatomy by -
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● Visiting a historical museum where you will
learn more about them.
● Seeing the Jurassic Park movie series.
● And purchasing Life-Like Dinosaur toys
from the market.

9. Distinguishable Characteristics
Dinosaurs were dominant terrestrial
inhabitants of the Mesozoic Era. Their
dominant features include:
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❖ An intelligent creature with a strong
body build.
❖ Variable sizes that range from small to
big.
❖ All of them had an upright stance,
with legs perpendicular to their body.

10. ❖ Many of them are fast-moving pack
hunters.
❖ All these reptiles have an upright
stance with legs perpendicular to
their body.
❖ Dinosaurs had two holes behind
their eye sockets.
❖ They have large, strong jaw
muscles.
❖ They laid eggs.
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11. Who's to Blame for the
Extinction of the Dinosaurs?
Recent evidence in Sweden supports the
theory Cretaceous–Paleogene extinction
event that took place approximately 66
million years ago on earth.
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12. From then on, Dinosaurs got divided into
two parts:
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● Avian dinosaurs or modern-day birds
that have evolved themselves and are
co-existing with us.
● The extinct non-avian dinosaurs that
include everyone except birds.

13. This mass extinction is said to have occurred via
two mechanisms that have played major roles:
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➔ An extraterrestrial asteroid or meteorite
collided with earth.
➔ This resulted in a flood basalt or volcanic
series of eruptions that covered large
stretches of land and the oceanic floor with
basalt lava.
➔ These explosions resulted in the release of
toxic gases as well as abrupt climatic
changes.

14. Info@ubuy.com
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